1/*
  2 * SPI access for Dialog DA9052 PMICs.
  3 *
  4 * Copyright(c) 2011 Dialog Semiconductor Ltd.
  5 *
  6 * Author: David Dajun Chen <dchen@diasemi.com>
  7 *
  8 * This program is free software; you can redistribute it and/or modify
  9 * it under the terms of the GNU General Public License as published by
 10 * the Free Software Foundation; either version 2 of the License, or
 11 * (at your option) any later version.
 12 *
 13 */
 14
 15#include <linux/device.h>
 16#include <linux/module.h>
 17#include <linux/input.h>
 18#include <linux/mfd/core.h>
 19#include <linux/spi/spi.h>
 20#include <linux/err.h>
 21
 22#include <linux/mfd/da9052/da9052.h>
 23
 24static int da9052_spi_probe(struct spi_device *spi)
 25{
 26	struct regmap_config config;
 27	int ret;
 28	const struct spi_device_id *id = spi_get_device_id(spi);
 29	struct da9052 *da9052;
 30
 31	da9052 = devm_kzalloc(&spi->dev, sizeof(struct da9052), GFP_KERNEL);
 32	if (!da9052)
 33		return -ENOMEM;
 34
 35	spi->mode = SPI_MODE_0;
 36	spi->bits_per_word = 8;
 37	spi_setup(spi);
 38
 39	da9052->dev = &spi->dev;
 40	da9052->chip_irq = spi->irq;
 41
 42	spi_set_drvdata(spi, da9052);
 43
 44	config = da9052_regmap_config;
 45	config.read_flag_mask = 1;
 46	config.reg_bits = 7;
 47	config.pad_bits = 1;
 48	config.val_bits = 8;
 49	config.use_single_rw = 1;
 50
 51	da9052->regmap = devm_regmap_init_spi(spi, &config);
 52	if (IS_ERR(da9052->regmap)) {
 53		ret = PTR_ERR(da9052->regmap);
 54		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 55			ret);
 56		return ret;
 57	}
 58
 59	return da9052_device_init(da9052, id->driver_data);
 60}
 61
 62static int da9052_spi_remove(struct spi_device *spi)
 63{
 64	struct da9052 *da9052 = spi_get_drvdata(spi);
 65
 66	da9052_device_exit(da9052);
 67	return 0;
 68}
 69
 70static const struct spi_device_id da9052_spi_id[] = {
 71	{"da9052", DA9052},
 72	{"da9053-aa", DA9053_AA},
 73	{"da9053-ba", DA9053_BA},
 74	{"da9053-bb", DA9053_BB},
 75	{"da9053-bc", DA9053_BC},
 76	{}
 77};
 78
 79static struct spi_driver da9052_spi_driver = {
 80	.probe = da9052_spi_probe,
 81	.remove = da9052_spi_remove,
 82	.id_table = da9052_spi_id,
 83	.driver = {
 84		.name = "da9052",
 85	},
 86};
 87
 88static int __init da9052_spi_init(void)
 89{
 90	int ret;
 91
 92	ret = spi_register_driver(&da9052_spi_driver);
 93	if (ret != 0) {
 94		pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
 95		return ret;
 96	}
 97
 98	return 0;
 99}
100subsys_initcall(da9052_spi_init);
101
102static void __exit da9052_spi_exit(void)
103{
104	spi_unregister_driver(&da9052_spi_driver);
105}
106module_exit(da9052_spi_exit);
107
108MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
109MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
110MODULE_LICENSE("GPL");